restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/rests/services/impl/RestconfDataServiceImpl.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.restconf.nb.rfc8040.rests.services.impl;
   9
  10 import static java.util.Objects.requireNonNull;
  11 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.INSERT;
  12 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.POINT;
  13 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.NOTIFICATION_STREAM;
  14 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAMS_PATH;
  15 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_ACCESS_PATH_PART;
  16 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_LOCATION_PATH_PART;
  17 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_PATH;
  18 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_PATH_PART;
  19
  20 import com.google.common.collect.ImmutableList;
  21 import java.net.URI;
  22 import java.time.Clock;
  23 import java.time.LocalDateTime;
  24 import java.time.format.DateTimeFormatter;
  25 import java.util.List;
  26 import java.util.Map.Entry;
  27 import java.util.Optional;
  28 import java.util.concurrent.ExecutionException;
  29 import javax.ws.rs.Path;
  30 import javax.ws.rs.core.Response;
  31 import javax.ws.rs.core.Response.Status;
  32 import javax.ws.rs.core.UriInfo;
  33 import org.eclipse.jdt.annotation.Nullable;
  34 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  35 import org.opendaylight.mdsal.dom.api.DOMActionResult;
  36 import org.opendaylight.mdsal.dom.api.DOMMountPoint;
  37 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
  38 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
  39 import org.opendaylight.restconf.common.context.NormalizedNodeContext;
  40 import org.opendaylight.restconf.common.context.WriterParameters;
  41 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
  42 import org.opendaylight.restconf.common.errors.RestconfError;
  43 import org.opendaylight.restconf.common.errors.RestconfError.ErrorTag;
  44 import org.opendaylight.restconf.common.errors.RestconfError.ErrorType;
  45 import org.opendaylight.restconf.common.patch.PatchContext;
  46 import org.opendaylight.restconf.common.patch.PatchStatusContext;
  47 import org.opendaylight.restconf.nb.rfc8040.Rfc8040;
  48 import org.opendaylight.restconf.nb.rfc8040.handlers.ActionServiceHandler;
  49 import org.opendaylight.restconf.nb.rfc8040.handlers.DOMMountPointServiceHandler;
  50 import org.opendaylight.restconf.nb.rfc8040.handlers.SchemaContextHandler;
  51 import org.opendaylight.restconf.nb.rfc8040.handlers.TransactionChainHandler;
  52 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfDataService;
  53 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfStreamsSubscriptionService;
  54 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.MdsalRestconfStrategy;
  55 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.RestconfStrategy;
  56 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.RestconfTransaction;
  57 import org.opendaylight.restconf.nb.rfc8040.rests.utils.DeleteDataTransactionUtil;
  58 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PatchDataTransactionUtil;
  59 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PlainPatchDataTransactionUtil;
  60 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PostDataTransactionUtil;
  61 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PutDataTransactionUtil;
  62 import org.opendaylight.restconf.nb.rfc8040.rests.utils.ReadDataTransactionUtil;
  63 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant;
  64 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.Insert;
  65 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfInvokeOperationsUtil;
  66 import org.opendaylight.restconf.nb.rfc8040.streams.Configuration;
  67 import org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationListenerAdapter;
  68 import org.opendaylight.restconf.nb.rfc8040.utils.mapping.RestconfMappingNodeUtil;
  69 import org.opendaylight.restconf.nb.rfc8040.utils.parser.ParserIdentifier;
  70 import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev140708.NotificationOutputTypeGrouping.NotificationOutputType;
  71 import org.opendaylight.yangtools.concepts.Immutable;
  72 import org.opendaylight.yangtools.yang.common.QName;
  73 import org.opendaylight.yangtools.yang.common.Revision;
  74 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  75 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  76 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  77 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  78 import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
  79 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  80 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  81 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  82 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
  83 import org.slf4j.Logger;
  84 import org.slf4j.LoggerFactory;
  85
  86 /**
  87  * Implementation of {@link RestconfDataService}.
  88  */
  89 @Path("/")
  90 public class RestconfDataServiceImpl implements RestconfDataService {
  91     // FIXME: we should be able to interpret 'point' and refactor this class into a behavior
  92     private static final class QueryParams implements Immutable {
  93         final @Nullable String point;
  94         final @Nullable Insert insert;
  95
  96         QueryParams(final @Nullable Insert insert, final @Nullable String point) {
  97             this.insert = insert;
  98             this.point = point;
  99         }
 100     }
 101
 102     private static final Logger LOG = LoggerFactory.getLogger(RestconfDataServiceImpl.class);
 103     private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MMM-dd HH:mm:ss");
 104
 105     private final RestconfStreamsSubscriptionService delegRestconfSubscrService;
 106     private final SubscribeToStreamUtil streamUtils;
 107
 108     // FIXME: evaluate thread-safety of updates (synchronized) vs. access (mostly unsynchronized) here
 109     private SchemaContextHandler schemaContextHandler;
 110     private TransactionChainHandler transactionChainHandler;
 111     private DOMMountPointServiceHandler mountPointServiceHandler;
 112     private volatile ActionServiceHandler actionServiceHandler;
 113
 114     public RestconfDataServiceImpl(final SchemaContextHandler schemaContextHandler,
 115             final TransactionChainHandler transactionChainHandler,
 116             final DOMMountPointServiceHandler mountPointServiceHandler,
 117             final RestconfStreamsSubscriptionService delegRestconfSubscrService,
 118             final ActionServiceHandler actionServiceHandler,
 119             final Configuration configuration) {
 120         this.actionServiceHandler = requireNonNull(actionServiceHandler);
 121         this.schemaContextHandler = requireNonNull(schemaContextHandler);
 122         this.transactionChainHandler = requireNonNull(transactionChainHandler);
 123         this.mountPointServiceHandler = requireNonNull(mountPointServiceHandler);
 124         this.delegRestconfSubscrService = requireNonNull(delegRestconfSubscrService);
 125         streamUtils = configuration.isUseSSE() ? SubscribeToStreamUtil.serverSentEvents()
 126                 : SubscribeToStreamUtil.webSockets();
 127     }
 128
 129     @Override
 130     public synchronized void updateHandlers(final Object... handlers) {
 131         for (final Object object : handlers) {
 132             if (object instanceof SchemaContextHandler) {
 133                 schemaContextHandler = (SchemaContextHandler) object;
 134             } else if (object instanceof ActionServiceHandler) {
 135                 actionServiceHandler = (ActionServiceHandler) object;
 136             } else if (object instanceof DOMMountPointServiceHandler) {
 137                 mountPointServiceHandler = (DOMMountPointServiceHandler) object;
 138             } else if (object instanceof TransactionChainHandler) {
 139                 transactionChainHandler = (TransactionChainHandler) object;
 140             }
 141         }
 142     }
 143
 144     @Override
 145     public Response readData(final UriInfo uriInfo) {
 146         return readData(null, uriInfo);
 147     }
 148
 149     @Override
 150     public Response readData(final String identifier, final UriInfo uriInfo) {
 151         final EffectiveModelContext schemaContextRef = this.schemaContextHandler.get();
 152         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
 153                 identifier, schemaContextRef, Optional.of(this.mountPointServiceHandler.get()));
 154         final WriterParameters parameters = ReadDataTransactionUtil.parseUriParameters(instanceIdentifier, uriInfo);
 155
 156         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
 157         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 158         final NormalizedNode<?, ?> node;
 159         if (parameters.getFieldPaths() != null && !parameters.getFieldPaths().isEmpty()) {
 160             node = ReadDataTransactionUtil.readData(parameters.getContent(), instanceIdentifier.getInstanceIdentifier(),
 161                     strategy, parameters.getWithDefault(), schemaContextRef, parameters.getFieldPaths());
 162         } else {
 163             node = readData(identifier, parameters.getContent(), instanceIdentifier.getInstanceIdentifier(), strategy,
 164                     parameters.getWithDefault(), schemaContextRef, uriInfo);
 165         }
 166         if (identifier != null && identifier.contains(STREAM_PATH) && identifier.contains(STREAM_ACCESS_PATH_PART)
 167                 && identifier.contains(STREAM_LOCATION_PATH_PART)) {
 168             final String value = (String) node.getValue();
 169             final String streamName = value.substring(value.indexOf(NOTIFICATION_STREAM + '/'));
 170             this.delegRestconfSubscrService.subscribeToStream(streamName, uriInfo);
 171         }
 172         if (node == null) {
 173             throw new RestconfDocumentedException(
 174                     "Request could not be completed because the relevant data model content does not exist",
 175                     RestconfError.ErrorType.PROTOCOL,
 176                     RestconfError.ErrorTag.DATA_MISSING);
 177         }
 178
 179         if (parameters.getContent().equals(RestconfDataServiceConstant.ReadData.ALL)
 180                     || parameters.getContent().equals(RestconfDataServiceConstant.ReadData.CONFIG)) {
 181             final QName type = node.getNodeType();
 182             return Response.status(Status.OK)
 183                     .entity(new NormalizedNodeContext(instanceIdentifier, node, parameters))
 184                     .header("ETag", '"' + type.getModule().getRevision().map(Revision::toString).orElse(null)
 185                         + "-" + type.getLocalName() + '"')
 186                     .header("Last-Modified", FORMATTER.format(LocalDateTime.now(Clock.systemUTC())))
 187                     .build();
 188         }
 189
 190         return Response.status(Status.OK)
 191             .entity(new NormalizedNodeContext(instanceIdentifier, node, parameters))
 192             .build();
 193     }
 194
 195     /**
 196      * Read specific type of data from data store via transaction and if identifier read data from
 197      * streams then put streams from actual schema context to datastore.
 198      *
 199      * @param identifier    identifier of data to read
 200      * @param content       type of data to read (config, state, all)
 201      * @param strategy      {@link RestconfStrategy} - object that perform the actual DS operations
 202      * @param withDefa      value of with-defaults parameter
 203      * @param schemaContext schema context
 204      * @param uriInfo       uri info
 205      * @return {@link NormalizedNode}
 206      */
 207     private NormalizedNode<?, ?> readData(final String identifier, final String content,
 208             final YangInstanceIdentifier path, final RestconfStrategy strategy, final String withDefa,
 209             final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
 210         if (identifier != null && identifier.contains(STREAMS_PATH) && !identifier.contains(STREAM_PATH_PART)) {
 211             createAllYangNotificationStreams(strategy, schemaContext, uriInfo);
 212         }
 213         return ReadDataTransactionUtil.readData(content, path, strategy, withDefa, schemaContext);
 214     }
 215
 216     private void createAllYangNotificationStreams(final RestconfStrategy strategy,
 217             final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
 218         final RestconfTransaction transaction = strategy.prepareWriteExecution();
 219
 220         for (final NotificationDefinition notificationDefinition : schemaContext.getNotifications()) {
 221             final NotificationListenerAdapter notifiStreamXML =
 222                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 223                     NotificationOutputType.XML);
 224             final NotificationListenerAdapter notifiStreamJSON =
 225                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 226                     NotificationOutputType.JSON);
 227             writeNotificationStreamToDatastore(schemaContext, uriInfo, transaction, notifiStreamXML);
 228             writeNotificationStreamToDatastore(schemaContext, uriInfo, transaction, notifiStreamJSON);
 229         }
 230         try {
 231             transaction.commit().get();
 232         } catch (final InterruptedException | ExecutionException e) {
 233             throw new RestconfDocumentedException("Problem while putting data to DS.", e);
 234         }
 235     }
 236
 237     private void writeNotificationStreamToDatastore(final EffectiveModelContext schemaContext,
 238             final UriInfo uriInfo, final RestconfTransaction transaction, final NotificationListenerAdapter listener) {
 239         final URI uri = streamUtils.prepareUriByStreamName(uriInfo, listener.getStreamName());
 240         final MapEntryNode mapToStreams = RestconfMappingNodeUtil.mapYangNotificationStreamByIetfRestconfMonitoring(
 241                 listener.getSchemaPath().lastNodeIdentifier(), schemaContext.getNotifications(), null,
 242                 listener.getOutputType(), uri);
 243
 244         transaction.merge(LogicalDatastoreType.OPERATIONAL,
 245             Rfc8040.MonitoringModule.restconfStateStreamPath(mapToStreams.getIdentifier()), mapToStreams);
 246     }
 247
 248     @Override
 249     public Response putData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 250         requireNonNull(payload);
 251
 252         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 253
 254         final InstanceIdentifierContext<? extends SchemaNode> iid = payload.getInstanceIdentifierContext();
 255
 256         PutDataTransactionUtil.validInputData(iid.getSchemaNode(), payload);
 257         PutDataTransactionUtil.validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 258         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 259
 260         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 261         final EffectiveModelContext ref = mountPoint == null
 262                 ? this.schemaContextHandler.get() : modelContext(mountPoint);
 263
 264         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 265         return PutDataTransactionUtil.putData(payload, ref, strategy, checkedParms.insert, checkedParms.point);
 266     }
 267
 268     private static QueryParams checkQueryParameters(final UriInfo uriInfo) {
 269         boolean insertUsed = false;
 270         boolean pointUsed = false;
 271         Insert insert = null;
 272         String point = null;
 273
 274         for (final Entry<String, List<String>> entry : uriInfo.getQueryParameters().entrySet()) {
 275             switch (entry.getKey()) {
 276                 case INSERT:
 277                     if (insertUsed) {
 278                         throw new RestconfDocumentedException("Insert parameter can be used only once.",
 279                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 280                     }
 281
 282                     insertUsed = true;
 283                     final String str = entry.getValue().get(0);
 284                     insert = Insert.forValue(str);
 285                     if (insert == null) {
 286                         throw new RestconfDocumentedException("Unrecognized insert parameter value '" + str + "'",
 287                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 288                     }
 289                     break;
 290                 case POINT:
 291                     if (pointUsed) {
 292                         throw new RestconfDocumentedException("Point parameter can be used only once.",
 293                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 294                     }
 295
 296                     pointUsed = true;
 297                     point = entry.getValue().get(0);
 298                     break;
 299                 default:
 300                     throw new RestconfDocumentedException("Bad parameter for post: " + entry.getKey(),
 301                             RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 302             }
 303         }
 304
 305         checkQueryParams(insertUsed, pointUsed, insert);
 306         return new QueryParams(insert, point);
 307     }
 308
 309     private static void checkQueryParams(final boolean insertUsed, final boolean pointUsed, final Insert insert) {
 310         if (pointUsed) {
 311             if (!insertUsed) {
 312                 throw new RestconfDocumentedException("Point parameter can't be used without Insert parameter.",
 313                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 314             }
 315
 316             if (insert != Insert.BEFORE && insert != Insert.AFTER) {
 317                 throw new RestconfDocumentedException(
 318                     "Point parameter can be used only with 'after' or 'before' values of Insert parameter.",
 319                     RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.BAD_ELEMENT);
 320             }
 321         }
 322     }
 323
 324     @Override
 325     public Response postData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 326         return postData(payload, uriInfo);
 327     }
 328
 329     @Override
 330     public Response postData(final NormalizedNodeContext payload, final UriInfo uriInfo) {
 331         requireNonNull(payload);
 332         if (payload.getInstanceIdentifierContext().getSchemaNode() instanceof ActionDefinition) {
 333             return invokeAction(payload);
 334         }
 335
 336         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 337         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 338         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 339         return PostDataTransactionUtil.postData(uriInfo, payload, strategy,
 340                 getSchemaContext(mountPoint), checkedParms.insert, checkedParms.point);
 341     }
 342
 343     @Override
 344     public Response deleteData(final String identifier) {
 345         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
 346                 identifier, this.schemaContextHandler.get(), Optional.of(this.mountPointServiceHandler.get()));
 347
 348         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
 349         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 350         return DeleteDataTransactionUtil.deleteData(strategy, instanceIdentifier.getInstanceIdentifier());
 351     }
 352
 353     @Override
 354     public PatchStatusContext patchData(final String identifier, final PatchContext context, final UriInfo uriInfo) {
 355         return patchData(context, uriInfo);
 356     }
 357
 358     @Override
 359     public PatchStatusContext patchData(final PatchContext context, final UriInfo uriInfo) {
 360         final DOMMountPoint mountPoint = requireNonNull(context).getInstanceIdentifierContext().getMountPoint();
 361         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 362         return PatchDataTransactionUtil.patchData(context, strategy, getSchemaContext(mountPoint));
 363     }
 364
 365     @Override
 366     public Response patchData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 367         requireNonNull(payload);
 368
 369         final InstanceIdentifierContext<? extends SchemaNode> iid = payload
 370                 .getInstanceIdentifierContext();
 371
 372         PutDataTransactionUtil.validInputData(iid.getSchemaNode(), payload);
 373         PutDataTransactionUtil.validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 374         PutDataTransactionUtil.validateListKeysEqualityInPayloadAndUri(payload);
 375
 376         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 377         final EffectiveModelContext ref = mountPoint == null
 378                 ? this.schemaContextHandler.get() : modelContext(mountPoint);
 379         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 380
 381         return PlainPatchDataTransactionUtil.patchData(payload, strategy, ref);
 382     }
 383
 384     private EffectiveModelContext getSchemaContext(final DOMMountPoint mountPoint) {
 385         return mountPoint == null ? schemaContextHandler.get() : modelContext(mountPoint);
 386     }
 387
 388     // FIXME: why is this synchronized?
 389     public synchronized RestconfStrategy getRestconfStrategy(final DOMMountPoint mountPoint) {
 390         if (mountPoint == null) {
 391             return new MdsalRestconfStrategy(transactionChainHandler);
 392         }
 393
 394         return RestconfStrategy.forMountPoint(mountPoint).orElseThrow(() -> {
 395             LOG.warn("Mount point {} does not expose a suitable access interface", mountPoint.getIdentifier());
 396             return new RestconfDocumentedException("Could not find a supported access interface in mount point "
 397                 + mountPoint.getIdentifier());
 398         });
 399     }
 400
 401     /**
 402      * Invoke Action operation.
 403      *
 404      * @param payload {@link NormalizedNodeContext} - the body of the operation
 405      * @return {@link NormalizedNodeContext} wrapped in {@link Response}
 406      */
 407     public Response invokeAction(final NormalizedNodeContext payload) {
 408         final InstanceIdentifierContext<?> context = payload.getInstanceIdentifierContext();
 409         final DOMMountPoint mountPoint = context.getMountPoint();
 410         final Absolute schemaPath = Absolute.of(ImmutableList.copyOf(context.getSchemaNode().getPath()
 411             .getPathFromRoot()));
 412         final YangInstanceIdentifier yangIIdContext = context.getInstanceIdentifier();
 413         final NormalizedNode<?, ?> data = payload.getData();
 414
 415         if (yangIIdContext.isEmpty() && !RestconfDataServiceConstant.NETCONF_BASE_QNAME.equals(data.getNodeType())) {
 416             throw new RestconfDocumentedException("Instance identifier need to contain at least one path argument",
 417                 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
 418         }
 419
 420         final DOMActionResult response;
 421         final EffectiveModelContext schemaContextRef;
 422         if (mountPoint != null) {
 423             response = RestconfInvokeOperationsUtil.invokeActionViaMountPoint(mountPoint, (ContainerNode) data,
 424                 schemaPath, yangIIdContext);
 425             schemaContextRef = modelContext(mountPoint);
 426         } else {
 427             response = RestconfInvokeOperationsUtil.invokeAction((ContainerNode) data, schemaPath,
 428                 this.actionServiceHandler, yangIIdContext);
 429             schemaContextRef = this.schemaContextHandler.get();
 430         }
 431         final DOMActionResult result = RestconfInvokeOperationsUtil.checkActionResponse(response);
 432
 433         ActionDefinition resultNodeSchema = null;
 434         ContainerNode resultData = null;
 435         if (result != null) {
 436             final Optional<ContainerNode> optOutput = result.getOutput();
 437             if (optOutput.isPresent()) {
 438                 resultData = optOutput.get();
 439                 resultNodeSchema = (ActionDefinition) context.getSchemaNode();
 440             }
 441         }
 442
 443         if (resultData != null && resultData.getValue().isEmpty()) {
 444             return Response.status(Status.NO_CONTENT).build();
 445         }
 446
 447         return Response.status(Status.OK)
 448             .entity(new NormalizedNodeContext(
 449                 new InstanceIdentifierContext<>(yangIIdContext, resultNodeSchema, mountPoint, schemaContextRef),
 450                 resultData))
 451             .build();
 452     }
 453
 454     private static EffectiveModelContext modelContext(final DOMMountPoint mountPoint) {
 455         return mountPoint.getService(DOMSchemaService.class)
 456             .flatMap(svc -> Optional.ofNullable(svc.getGlobalContext()))
 457             .orElse(null);
 458     }
 459 }